Picosecond degenerate four-wave mixing on potassium in a methane–air flame

Autor:	G. J. Fiechtner, Mark Linne
Rok vydání:	1994
Předmět:	Materials science Spatial filter business.industry Doping Laser Atomic and Molecular Physics and Optics law.invention Four-wave mixing Optics Mode-locking law Picosecond Sapphire business Mixing (physics)
Zdroj:	Optics Letters. 19:667
ISSN:	1539-4794 0146-9592
DOI:	10.1364/ol.19.000667
Popis:	We demonstrate that picosecond mode-locked laser-based degenerate four-wave mixing can be detected with good signal-to-noise ratios in an optically thin flame and that detailed turbulence statistics can be acquired by use of this technique. A regeneratively mode-locked Ti:sapphire laser was tuned to the 4(2)S((1/2))-4(2)P degrees ((1/2)) transition in atomic potassium (which was doped into the flame) at 769.9 nm. Using the all-forward degenerate four-wave mixing geometry, we achieved signal-to-noise ratios of 70:1 without the use of a spatial filter. A sensitivity curve and a method for acquiring turbulence statistics are presented.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ebec1586b09f3d7c6dc329ffe0942d8 https://doi.org/10.1364/ol.19.000667 Zobrazit plný text záznamu